[v3.2] Add grafana dashboard importing API (#11)

* Add API to import grafana templates to kubesphere dashboard
* Merge and fix the latest codes from kubesphere #2501

Signed-off-by: zhu733756 <talonzhu@yunify.com>

vendor/github.com/grafana-tools/sdk/rest-datasource.go

@@ -0,0 +1,172 @@
+package sdk
+
+/*
+   Copyright 2016 Alexander I.Grafov <grafov@gmail.com>
+   Copyright 2016-2019 The Grafana SDK authors
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+	   http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
+
+   ॐ तारे तुत्तारे तुरे स्व
+*/
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+)
+
+// GetAllDatasources gets all datasources.
+// Reflects GET /api/datasources API call.
+func (r *Client) GetAllDatasources(ctx context.Context) ([]Datasource, error) {
+	var (
+		raw  []byte
+		ds   []Datasource
+		code int
+		err  error
+	)
+	if raw, code, err = r.get(ctx, "api/datasources", nil); err != nil {
+		return nil, err
+	}
+	if code != 200 {
+		return nil, fmt.Errorf("HTTP error %d: returns %s", code, raw)
+	}
+	err = json.Unmarshal(raw, &ds)
+	return ds, err
+}
+
+// GetDatasource gets an datasource by ID.
+// Reflects GET /api/datasources/:datasourceId API call.
+func (r *Client) GetDatasource(ctx context.Context, id uint) (Datasource, error) {
+	var (
+		raw  []byte
+		ds   Datasource
+		code int
+		err  error
+	)
+	if raw, code, err = r.get(ctx, fmt.Sprintf("api/datasources/%d", id), nil); err != nil {
+		return ds, err
+	}
+	if code != 200 {
+		return ds, fmt.Errorf("HTTP error %d: returns %s", code, raw)
+	}
+	err = json.Unmarshal(raw, &ds)
+	return ds, err
+}
+
+// GetDatasourceByName gets an datasource by Name.
+// Reflects GET /api/datasources/name/:datasourceName API call.
+func (r *Client) GetDatasourceByName(ctx context.Context, name string) (Datasource, error) {
+	var (
+		raw  []byte
+		ds   Datasource
+		code int
+		err  error
+	)
+	if raw, code, err = r.get(ctx, fmt.Sprintf("api/datasources/name/%s", name), nil); err != nil {
+		return ds, err
+	}
+	if code != 200 {
+		return ds, fmt.Errorf("HTTP error %d: returns %s", code, raw)
+	}
+	err = json.Unmarshal(raw, &ds)
+	return ds, err
+}
+
+// CreateDatasource creates a new datasource.
+// Reflects POST /api/datasources API call.
+func (r *Client) CreateDatasource(ctx context.Context, ds Datasource) (StatusMessage, error) {
+	var (
+		raw  []byte
+		resp StatusMessage
+		err  error
+	)
+	if raw, err = json.Marshal(ds); err != nil {
+		return StatusMessage{}, err
+	}
+	if raw, _, err = r.post(ctx, "api/datasources", nil, raw); err != nil {
+		return StatusMessage{}, err
+	}
+	if err = json.Unmarshal(raw, &resp); err != nil {
+		return StatusMessage{}, err
+	}
+	return resp, nil
+}
+
+// UpdateDatasource updates a datasource from data passed in argument.
+// Reflects PUT /api/datasources/:datasourceId API call.
+func (r *Client) UpdateDatasource(ctx context.Context, ds Datasource) (StatusMessage, error) {
+	var (
+		raw  []byte
+		resp StatusMessage
+		err  error
+	)
+	if raw, err = json.Marshal(ds); err != nil {
+		return StatusMessage{}, err
+	}
+	if raw, _, err = r.put(ctx, fmt.Sprintf("api/datasources/%d", ds.ID), nil, raw); err != nil {
+		return StatusMessage{}, err
+	}
+	if err = json.Unmarshal(raw, &resp); err != nil {
+		return StatusMessage{}, err
+	}
+	return resp, nil
+}
+
+// DeleteDatasource deletes an existing datasource by ID.
+// Reflects DELETE /api/datasources/:datasourceId API call.
+func (r *Client) DeleteDatasource(ctx context.Context, id uint) (StatusMessage, error) {
+	var (
+		raw   []byte
+		reply StatusMessage
+		err   error
+	)
+	if raw, _, err = r.delete(ctx, fmt.Sprintf("api/datasources/%d", id)); err != nil {
+		return StatusMessage{}, err
+	}
+	err = json.Unmarshal(raw, &reply)
+	return reply, err
+}
+
+// DeleteDatasourceByName deletes an existing datasource by Name.
+// Reflects DELETE /api/datasources/name/:datasourceName API call.
+func (r *Client) DeleteDatasourceByName(ctx context.Context, name string) (StatusMessage, error) {
+	var (
+		raw   []byte
+		reply StatusMessage
+		err   error
+	)
+	if raw, _, err = r.delete(ctx, fmt.Sprintf("api/datasources/name/%s", name)); err != nil {
+		return StatusMessage{}, err
+	}
+	err = json.Unmarshal(raw, &reply)
+	return reply, err
+}
+
+// GetDatasourceTypes gets all available plugins for the datasources.
+// Reflects GET /api/datasources/plugins API call.
+func (r *Client) GetDatasourceTypes(ctx context.Context) (map[string]DatasourceType, error) {
+	var (
+		raw     []byte
+		dsTypes = make(map[string]DatasourceType)
+		code    int
+		err     error
+	)
+	if raw, code, err = r.get(ctx, "api/datasources/plugins", nil); err != nil {
+		return nil, err
+	}
+	if code != 200 {
+		return nil, fmt.Errorf("HTTP error %d: returns %s", code, raw)
+	}
+	err = json.Unmarshal(raw, &dsTypes)
+	return dsTypes, err
+}